These 14k white gold earrings feature 1.05 ct. t.w. tanzanite, and 0.14 ct. t.w. diamond that measures 3.9-mm. length x 7.8-mm. width. Almost all gemstones have been treated to enhance their color and require special care. Prong setting 36 Diamond, 2 Tanzanite Material & Care Diamond Use gold polishing cloth on gold items.